Ethereum blockchain network
Ethereum is an  open-source platform for decentralized applications commonly referred as dApp . Ethereum purpose is to be a decentralized computer  that anyone can have access while all data are publicly available.  Smart contracts  can run on Ethereum enabling transactions without the need of a third party service.  Tokens , DeFi , DEXs , NFTs and more  are already being built upon the Ethereum blockchain.
 
 Creation of Ethereum  
 Ethereum founders  are Vitalik Buterin, Mihai Alisie, Anthony Di lorio, Charles Hoskinson, Amir Chetrit, Joseph Lubin, Gavin Wood, and Jeffrey Wilke . Some members are  not part  of the Ethereum foundation anymore , Charles Hoskinson has moved on Cardano and Gavin Wood has moved on Polkadot .
 
 Ether, Ethereum Gas, ERC20  Ethereum Token Standard
  Ether is the currency  Ethereum network is using. Its the base currency which can be mined and traded . Ether is used to pay for transaction fees  and smart contract executions and uses gas unit as a measurement of computational effort. Gas prices set by miners based on supply  and demand . Gas  fees are paid in Ether . With ERC20 tokens you can create fungible tokens compatible with the Ethereum network and can represent a standard to interoperable with other products and services in the Ethereum network. Notable crypto projects using  ERC20 framework are ,Tether (USDT) ,Chainlink (LINK) ,Binance coin (BNB) ,USD coin (USDC) ,Wrapped bitcoin (WBTC) ,Dai (DAI) .